GST Calculator
Find the price with GST or strip GST out of a tax-inclusive price. Choose a standard rate or enter your own.
Use the tool
Loading the tool...
How to use it
- Enter the amount.
- Choose the GST rate, or pick Custom and type it.
- Choose Add GST if the amount is before tax, or Remove GST if it already includes tax.
- Read the base price, GST and total.
Tips for best results
- Use CGST + SGST for sales within one state and IGST for sales between states.
- Rates differ by item and can change. Confirm the correct rate for your goods or service before invoicing.
Frequently asked questions
What is the GST formula?
GST amount = price before GST x rate / 100. To remove GST, divide the tax-inclusive price by (1 + rate / 100).
Which rate should I use?
It depends on what you sell. Check the current official rate schedule or ask your accountant.